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source: palm/trunk/SOURCE/time_integration.f90 @ 1958

Last change on this file since 1958 was 1958, checked in by suehring, 8 years ago
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1	!> @file time_integration.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1958 2016-07-07 10:51:40Z suehring $
26	!
27	! 1957 2016-07-07 10:43:48Z suehring
28	! flight module added
29	!
30	! 1919 2016-05-27 14:51:23Z raasch
31	! Initial version of purely vertical nesting introduced.
32	!
33	! 1918 2016-05-27 14:35:57Z raasch
34	! determination of time step moved to the end of the time step loop,
35	! the first time step is now always calculated before the time step loop (i.e.
36	! also in case of restart runs)
37	!
38	! 1914 2016-05-26 14:44:07Z witha
39	! Added call for wind turbine model
40	!
41	! 1878 2016-04-19 12:30:36Z hellstea
42	! Synchronization for nested runs rewritten
43	!
44	! 1853 2016-04-11 09:00:35Z maronga
45	! Adjusted for use with radiation_scheme = constant
46	!
47	! 1849 2016-04-08 11:33:18Z hoffmann
48	! Adapted for modularization of microphysics
49	!
50	! 1833 2016-04-07 14:23:03Z raasch
51	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
52	!
53	! 1831 2016-04-07 13:15:51Z hoffmann
54	! turbulence renamed collision_turbulence
55	!
56	! 1822 2016-04-07 07:49:42Z hoffmann
57	! icloud_scheme replaced by microphysics_*
58	!
59	! 1808 2016-04-05 19:44:00Z raasch
60	! output message in case unscheduled radiation calls removed
61	!
62	! 1797 2016-03-21 16:50:28Z raasch
63	! introduction of different datatransfer modes
64	!
65	! 1791 2016-03-11 10:41:25Z raasch
66	! call of pmci_update_new removed
67	!
68	! 1786 2016-03-08 05:49:27Z raasch
69	! +module spectrum
70	!
71	! 1783 2016-03-06 18:36:17Z raasch
72	! switch back of netcdf data format for mask output moved to the mask output
73	! routine
74	!
75	! 1781 2016-03-03 15:12:23Z raasch
76	! some pmc calls removed at the beginning (before timeloop),
77	! pmc initialization moved to the main program
78	!
79	! 1764 2016-02-28 12:45:19Z raasch
80	! PMC_ACTIVE flags removed,
81	! bugfix: nest synchronization after first call of timestep
82	!
83	! 1762 2016-02-25 12:31:13Z hellstea
84	! Introduction of nested domain feature
85	!
86	! 1736 2015-12-04 08:56:33Z raasch
87	! no perturbations added to total domain if energy limit has been set zero
88	!
89	! 1691 2015-10-26 16:17:44Z maronga
90	! Added option for spin-ups without land surface and radiation models. Moved calls
91	! for radiation and lan surface schemes.
92	!
93	! 1682 2015-10-07 23:56:08Z knoop
94	! Code annotations made doxygen readable
95	!
96	! 1671 2015-09-25 03:29:37Z raasch
97	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
98	! for particles
99	!
100	! 1585 2015-04-30 07:05:52Z maronga
101	! Moved call of radiation scheme. Added support for RRTM
102	!
103	! 1551 2015-03-03 14:18:16Z maronga
104	! Added interface for different radiation schemes.
105	!
106	! 1496 2014-12-02 17:25:50Z maronga
107	! Added calls for the land surface model and radiation scheme
108	!
109	! 1402 2014-05-09 14:25:13Z raasch
110	! location messages modified
111	!
112	! 1384 2014-05-02 14:31:06Z raasch
113	! location messages added
114	!
115	! 1380 2014-04-28 12:40:45Z heinze
116	! CALL of nudge_ref added
117	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
118	!
119	! 1365 2014-04-22 15:03:56Z boeske
120	! Reset sums_ls_l to zero at each timestep
121	! +sums_ls_l
122	! Calculation of reference state (previously in subroutine calc_mean_profile)
123
124	! 1342 2014-03-26 17:04:47Z kanani
125	! REAL constants defined as wp-kind
126	!
127	! 1320 2014-03-20 08:40:49Z raasch
128	! ONLY-attribute added to USE-statements,
129	! kind-parameters added to all INTEGER and REAL declaration statements,
130	! kinds are defined in new module kinds,
131	! old module precision_kind is removed,
132	! revision history before 2012 removed,
133	! comment fields (!:) to be used for variable explanations added to
134	! all variable declaration statements
135	! 1318 2014-03-17 13:35:16Z raasch
136	! module interfaces removed
137	!
138	! 1308 2014-03-13 14:58:42Z fricke
139	! +netcdf_data_format_save
140	! For masked data, parallel netcdf output is not tested so far, hence
141	! netcdf_data_format is switched back to non-paralell output.
142	!
143	! 1276 2014-01-15 13:40:41Z heinze
144	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
145	!
146	! 1257 2013-11-08 15:18:40Z raasch
147	! acc-update-host directive for timestep removed
148	!
149	! 1241 2013-10-30 11:36:58Z heinze
150	! Generalize calc_mean_profile for wider use
151	! Determine shf and qsws in dependence on data from LSF_DATA
152	! Determine ug and vg in dependence on data from LSF_DATA
153	! 1221 2013-09-10 08:59:13Z raasch
154	! host update of arrays before timestep is called
155	!
156	! 1179 2013-06-14 05:57:58Z raasch
157	! mean profiles for reference state are only calculated if required,
158	! small bugfix for background communication
159	!
160	! 1171 2013-05-30 11:27:45Z raasch
161	! split of prognostic_equations deactivated (comment lines), for the time being
162	!
163	! 1128 2013-04-12 06:19:32Z raasch
164	! asynchronous transfer of ghost point data realized for acc-optimized version:
165	! prognostic_equations are first called two times for those points required for
166	! the left-right and north-south exchange, respectively, and then for the
167	! remaining points,
168	! those parts requiring global communication moved from prognostic_equations to
169	! here
170	!
171	! 1115 2013-03-26 18:16:16Z hoffmann
172	! calculation of qr and nr is restricted to precipitation
173	!
174	! 1113 2013-03-10 02:48:14Z raasch
175	! GPU-porting of boundary conditions,
176	! openACC directives updated
177	! formal parameter removed from routine boundary_conds
178	!
179	! 1111 2013-03-08 23:54:10Z raasch
180	! +internal timestep counter for cpu statistics added,
181	! openACC directives updated
182	!
183	! 1092 2013-02-02 11:24:22Z raasch
184	! unused variables removed
185	!
186	! 1065 2012-11-22 17:42:36Z hoffmann
187	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
188	!
189	! 1053 2012-11-13 17:11:03Z hoffmann
190	! exchange of ghost points for nr, qr added
191	!
192	! 1036 2012-10-22 13:43:42Z raasch
193	! code put under GPL (PALM 3.9)
194	!
195	! 1019 2012-09-28 06:46:45Z raasch
196	! non-optimized version of prognostic_equations removed
197	!
198	! 1015 2012-09-27 09:23:24Z raasch
199	! +call of prognostic_equations_acc
200	!
201	! 1001 2012-09-13 14:08:46Z raasch
202	! all actions concerning leapfrog- and upstream-spline-scheme removed
203	!
204	! 849 2012-03-15 10:35:09Z raasch
205	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
206	!
207	! 825 2012-02-19 03:03:44Z raasch
208	! wang_collision_kernel renamed wang_kernel
209	!
210	! Revision 1.1 1997/08/11 06:19:04 raasch
211	! Initial revision
212	!
213	!
214	! Description:
215	! ------------
216	!> Integration in time of the model equations, statistical analysis and graphic
217	!> output
218	!------------------------------------------------------------------------------!
219	SUBROUTINE time_integration
220
221
222	USE advec_ws, &
223	ONLY: ws_statistics
224
225	USE arrays_3d, &
226	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
227	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
228	u, u_p, v, vpt, v_p, w, w_p
229
230	USE calc_mean_profile_mod, &
231	ONLY: calc_mean_profile
232
233	USE control_parameters, &
234	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
235	averaging_interval, averaging_interval_pr, &
236	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
237	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
238	cloud_physics, constant_flux_layer, constant_heatflux, &
239	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
240	coupling_start_time, current_timestep_number, &
241	disturbance_created, disturbance_energy_limit, dist_range, &
242	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
243	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
244	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
245	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
246	end_time, first_call_lpm, galilei_transformation, humidity, &
247	intermediate_timestep_count, &
248	intermediate_timestep_count_max, large_scale_forcing, &
249	loop_optimization, lsf_surf, lsf_vert, masks, &
250	microphysics_seifert, mid, nest_domain, &
251	neutral, nr_timesteps_this_run, nudging, &
252	ocean, on_device, passive_scalar, &
253	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
254	run_coupled, simulated_time, simulated_time_chr, &
255	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
256	skip_time_do3d, skip_time_domask, skip_time_dopr, &
257	skip_time_data_output_av, sloping_surface, &
258	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
259	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
260	time_do3d, time_domask, time_dopr, time_dopr_av, &
261	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
262	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
263	time_run_control, time_since_reference_point, &
264	turbulent_inflow, use_initial_profile_as_reference, &
265	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
266	ws_scheme_mom, ws_scheme_sca
267
268	USE cpulog, &
269	ONLY: cpu_log, log_point, log_point_s
270
271	USE flight_mod, &
272	ONLY: flight_measurement
273
274
275	USE indices, &
276	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
277	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
278
279	USE interaction_droplets_ptq_mod, &
280	ONLY: interaction_droplets_ptq
281
282	USE interfaces
283
284	USE kinds
285
286	USE land_surface_model_mod, &
287	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
288	skip_time_do_lsm
289
290	USE ls_forcing_mod, &
291	ONLY: ls_forcing_surf, ls_forcing_vert
292
293	USE microphysics_mod, &
294	ONLY: collision_turbulence
295
296	USE nudge_mod, &
297	ONLY: calc_tnudge, nudge_ref
298
299	USE particle_attributes, &
300	ONLY: particle_advection, particle_advection_start, &
301	use_sgs_for_particles, wang_kernel
302
303	USE pegrid
304
305	USE pmc_interface, &
306	ONLY: nested_run, nesting_mode, pmci_datatrans, &
307	pmci_ensure_nest_mass_conservation, pmci_synchronize
308
309	USE production_e_mod, &
310	ONLY: production_e_init
311
312	USE progress_bar, &
313	ONLY: finish_progress_bar, output_progress_bar
314
315	USE prognostic_equations_mod, &
316	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
317	prognostic_equations_vector
318
319	USE radiation_model_mod, &
320	ONLY: dt_radiation, force_radiation_call, radiation, &
321	radiation_clearsky, radiation_constant, radiation_rrtmg, &
322	radiation_scheme, skip_time_do_radiation, time_radiation
323
324	USE spectra_mod, &
325	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
326	skip_time_dosp
327
328	USE statistics, &
329	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
330	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
331
332	USE surface_layer_fluxes_mod, &
333	ONLY: surface_layer_fluxes
334
335	USE user_actions_mod, &
336	ONLY: user_actions
337
338	USE wind_turbine_model_mod, &
339	ONLY: wind_turbine, wtm_forces
340
341	IMPLICIT NONE
342
343	CHARACTER (LEN=9) :: time_to_string !<
344
345	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
346	!< steering of run control output interval
347
348	!
349	!-- At beginning determine the first time step
350	CALL timestep
351
352	!
353	!-- Synchronize the timestep in case of nested run.
354	IF ( nested_run ) THEN
355	!
356	!-- Synchronization by unifying the time step.
357	!-- Global minimum of all time-steps is used for all.
358	CALL pmci_synchronize
359	ENDIF
360
361	!
362	!-- Determine and print out the run control quantities before the first time
363	!-- step of this run. For the initial run, some statistics (e.g. divergence)
364	!-- need to be determined first.
365	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
366	CALL run_control
367
368	!
369	!-- Data exchange between coupled models in case that a call has been omitted
370	!-- at the end of the previous run of a job chain.
371	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
372	!
373	!-- In case of model termination initiated by the local model the coupler
374	!-- must not be called because this would again cause an MPI hang.
375	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
376	CALL surface_coupler
377	time_coupling = time_coupling - dt_coupling
378	ENDDO
379	IF (time_coupling == 0.0_wp .AND. &
380	time_since_reference_point < dt_coupling ) &
381	THEN
382	time_coupling = time_since_reference_point
383	ENDIF
384	ENDIF
385
386	#if defined( __dvrp_graphics )
387	!
388	!-- Time measurement with dvrp software
389	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
390	#endif
391
392	CALL location_message( 'start with time-stepping', .TRUE. )
393	!
394	!-- Start of the time loop
395	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
396	.NOT. terminate_run )
397
398	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
399
400	!
401	!-- Determine ug, vg and w_subs in dependence on data from external file
402	!-- LSF_DATA
403	IF ( large_scale_forcing .AND. lsf_vert ) THEN
404	CALL ls_forcing_vert ( simulated_time )
405	sums_ls_l = 0.0_wp
406	ENDIF
407
408	!
409	!-- Set pt_init and q_init to the current profiles taken from
410	!-- NUDGING_DATA
411	IF ( nudging ) THEN
412	CALL nudge_ref ( simulated_time )
413	!
414	!-- Store temperature gradient at the top boundary for possible Neumann
415	!-- boundary condition
416	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
417	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
418	ENDIF
419
420	!
421	!-- Execute the user-defined actions
422	CALL user_actions( 'before_timestep' )
423
424	!
425	!-- Calculate forces by wind turbines
426	IF ( wind_turbine ) THEN
427
428	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
429
430	CALL wtm_forces
431
432	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
433
434	ENDIF
435
436	!
437	!-- Start of intermediate step loop
438	intermediate_timestep_count = 0
439	DO WHILE ( intermediate_timestep_count < &
440	intermediate_timestep_count_max )
441
442	intermediate_timestep_count = intermediate_timestep_count + 1
443
444	!
445	!-- Set the steering factors for the prognostic equations which depend
446	!-- on the timestep scheme
447	CALL timestep_scheme_steering
448
449	!
450	!-- Calculate those variables needed in the tendency terms which need
451	!-- global communication
452	IF ( .NOT. use_single_reference_value .AND. &
453	.NOT. use_initial_profile_as_reference ) THEN
454	!
455	!-- Horizontally averaged profiles to be used as reference state in
456	!-- buoyancy terms (WARNING: only the respective last call of
457	!-- calc_mean_profile defines the reference state!)
458	IF ( .NOT. neutral ) THEN
459	CALL calc_mean_profile( pt, 4 )
460	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
461	ENDIF
462	IF ( ocean ) THEN
463	CALL calc_mean_profile( rho, 64 )
464	ref_state(:) = hom(:,1,64,0)
465	ENDIF
466	IF ( humidity ) THEN
467	CALL calc_mean_profile( vpt, 44 )
468	ref_state(:) = hom(:,1,44,0)
469	ENDIF
470
471	ENDIF
472
473	IF ( .NOT. constant_diffusion ) CALL production_e_init
474	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
475	intermediate_timestep_count == 1 ) CALL ws_statistics
476	!
477	!-- In case of nudging calculate current nudging time scale and horizontal
478	!-- means of u, v, pt and q
479	IF ( nudging ) THEN
480	CALL calc_tnudge( simulated_time )
481	CALL calc_mean_profile( u, 1 )
482	CALL calc_mean_profile( v, 2 )
483	CALL calc_mean_profile( pt, 4 )
484	CALL calc_mean_profile( q, 41 )
485	ENDIF
486
487	!
488	!-- Solve the prognostic equations. A fast cache optimized version with
489	!-- only one single loop is used in case of Piascek-Williams advection
490	!-- scheme. NEC vector machines use a different version, because
491	!-- in the other versions a good vectorization is prohibited due to
492	!-- inlining problems.
493	IF ( loop_optimization == 'cache' ) THEN
494	CALL prognostic_equations_cache
495	ELSEIF ( loop_optimization == 'vector' ) THEN
496	CALL prognostic_equations_vector
497	ELSEIF ( loop_optimization == 'acc' ) THEN
498	i_left = nxl; i_right = nxr
499	j_south = nys; j_north = nyn
500	CALL prognostic_equations_acc
501
502	! i_left = nxl; i_right = nxl+nbgp-1
503	! j_south = nys; j_north = nyn
504	! CALL prognostic_equations_acc
505	! i_left = nxr-nbgp+1; i_right = nxr
506	! j_south = nys; j_north = nyn
507	! CALL prognostic_equations_acc
508
509	!
510	!-- Exchange of ghost points (lateral boundary conditions)
511	IF ( background_communication ) THEN
512
513	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
514
515	send_receive = 'lr'
516	sendrecv_in_background = .TRUE.
517	req = 0
518	req_count = 0
519
520	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
521	on_device = .TRUE. ! to be removed after complete porting
522	ELSE ! of ghost point exchange
523	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
524	ENDIF
525
526	CALL exchange_horiz( u_p, nbgp )
527	CALL exchange_horiz( v_p, nbgp )
528	CALL exchange_horiz( w_p, nbgp )
529	CALL exchange_horiz( pt_p, nbgp )
530	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
531	IF ( ocean ) THEN
532	CALL exchange_horiz( sa_p, nbgp )
533	CALL exchange_horiz( rho, nbgp )
534	CALL exchange_horiz( prho, nbgp )
535	ENDIF
536	IF (humidity .OR. passive_scalar) THEN
537	CALL exchange_horiz( q_p, nbgp )
538	IF ( cloud_physics .AND. microphysics_seifert ) THEN
539	CALL exchange_horiz( qr_p, nbgp )
540	CALL exchange_horiz( nr_p, nbgp )
541	ENDIF
542	ENDIF
543	IF ( cloud_droplets ) THEN
544	CALL exchange_horiz( ql, nbgp )
545	CALL exchange_horiz( ql_c, nbgp )
546	CALL exchange_horiz( ql_v, nbgp )
547	CALL exchange_horiz( ql_vp, nbgp )
548	ENDIF
549	IF ( wang_kernel .OR. collision_turbulence .OR. &
550	use_sgs_for_particles ) THEN
551	CALL exchange_horiz( diss, nbgp )
552	ENDIF
553
554	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
555	on_device = .FALSE. ! to be removed after complete porting
556	ELSE ! of ghost point exchange
557	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
558	ENDIF
559
560	sendrecv_in_background = .FALSE.
561
562	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
563
564	ENDIF
565
566	! i_left = nxl+nbgp; i_right = nxr-nbgp
567	! j_south = nys; j_north = nys+nbgp-1
568	! CALL prognostic_equations_acc
569	! i_left = nxl+nbgp; i_right = nxr-nbgp
570	! j_south = nyn-nbgp+1; j_north = nyn
571	! CALL prognostic_equations_acc
572
573	IF ( background_communication ) THEN
574	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
575	#if defined( __parallel )
576	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
577	#endif
578	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
579
580	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
581
582	send_receive = 'ns'
583	sendrecv_in_background = .TRUE.
584	req = 0
585	req_count = 0
586
587	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
588	on_device = .TRUE. ! to be removed after complete porting
589	ELSE ! of ghost point exchange
590	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
591	ENDIF
592
593	CALL exchange_horiz( u_p, nbgp )
594	CALL exchange_horiz( v_p, nbgp )
595	CALL exchange_horiz( w_p, nbgp )
596	CALL exchange_horiz( pt_p, nbgp )
597	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
598	IF ( ocean ) THEN
599	CALL exchange_horiz( sa_p, nbgp )
600	CALL exchange_horiz( rho, nbgp )
601	CALL exchange_horiz( prho, nbgp )
602	ENDIF
603	IF (humidity .OR. passive_scalar) THEN
604	CALL exchange_horiz( q_p, nbgp )
605	IF ( cloud_physics .AND. microphysics_seifert ) THEN
606	CALL exchange_horiz( qr_p, nbgp )
607	CALL exchange_horiz( nr_p, nbgp )
608	ENDIF
609	ENDIF
610	IF ( cloud_droplets ) THEN
611	CALL exchange_horiz( ql, nbgp )
612	CALL exchange_horiz( ql_c, nbgp )
613	CALL exchange_horiz( ql_v, nbgp )
614	CALL exchange_horiz( ql_vp, nbgp )
615	ENDIF
616	IF ( wang_kernel .OR. collision_turbulence .OR. &
617	use_sgs_for_particles ) THEN
618	CALL exchange_horiz( diss, nbgp )
619	ENDIF
620
621	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
622	on_device = .FALSE. ! to be removed after complete porting
623	ELSE ! of ghost point exchange
624	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
625	ENDIF
626
627	sendrecv_in_background = .FALSE.
628
629	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
630
631	ENDIF
632
633	! i_left = nxl+nbgp; i_right = nxr-nbgp
634	! j_south = nys+nbgp; j_north = nyn-nbgp
635	! CALL prognostic_equations_acc
636
637	IF ( background_communication ) THEN
638	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
639	#if defined( __parallel )
640	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
641	#endif
642	send_receive = 'al'
643	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
644	ENDIF
645
646	ENDIF
647
648	!
649	!-- Particle transport/physics with the Lagrangian particle model
650	!-- (only once during intermediate steps, because it uses an Euler-step)
651	!-- ### particle model should be moved before prognostic_equations, in order
652	!-- to regard droplet interactions directly
653	IF ( particle_advection .AND. &
654	simulated_time >= particle_advection_start .AND. &
655	intermediate_timestep_count == 1 ) THEN
656	CALL lpm
657	first_call_lpm = .FALSE.
658	ENDIF
659
660	!
661	!-- Interaction of droplets with temperature and specific humidity.
662	!-- Droplet condensation and evaporation is calculated within
663	!-- advec_particles.
664	IF ( cloud_droplets .AND. &
665	intermediate_timestep_count == intermediate_timestep_count_max )&
666	THEN
667	CALL interaction_droplets_ptq
668	ENDIF
669
670	!
671	!-- Exchange of ghost points (lateral boundary conditions)
672	IF ( .NOT. background_communication ) THEN
673
674	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
675
676	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
677	on_device = .TRUE. ! to be removed after complete porting
678	ELSE ! of ghost point exchange
679	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
680	ENDIF
681
682	CALL exchange_horiz( u_p, nbgp )
683	CALL exchange_horiz( v_p, nbgp )
684	CALL exchange_horiz( w_p, nbgp )
685	CALL exchange_horiz( pt_p, nbgp )
686	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
687	IF ( ocean ) THEN
688	CALL exchange_horiz( sa_p, nbgp )
689	CALL exchange_horiz( rho, nbgp )
690	CALL exchange_horiz( prho, nbgp )
691	ENDIF
692	IF (humidity .OR. passive_scalar) THEN
693	CALL exchange_horiz( q_p, nbgp )
694	IF ( cloud_physics .AND. microphysics_seifert ) THEN
695	CALL exchange_horiz( qr_p, nbgp )
696	CALL exchange_horiz( nr_p, nbgp )
697	ENDIF
698	ENDIF
699	IF ( cloud_droplets ) THEN
700	CALL exchange_horiz( ql, nbgp )
701	CALL exchange_horiz( ql_c, nbgp )
702	CALL exchange_horiz( ql_v, nbgp )
703	CALL exchange_horiz( ql_vp, nbgp )
704	ENDIF
705	IF ( wang_kernel .OR. collision_turbulence .OR. &
706	use_sgs_for_particles ) THEN
707	CALL exchange_horiz( diss, nbgp )
708	ENDIF
709
710	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
711	on_device = .FALSE. ! to be removed after complete porting
712	ELSE ! of ghost point exchange
713	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
714	ENDIF
715
716	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
717
718	ENDIF
719
720	!
721	!-- Boundary conditions for the prognostic quantities (except of the
722	!-- velocities at the outflow in case of a non-cyclic lateral wall)
723	CALL boundary_conds
724
725	!
726	!-- Swap the time levels in preparation for the next time step.
727	CALL swap_timelevel
728
729	IF ( nested_run ) THEN
730
731	CALL cpu_log( log_point(60), 'nesting', 'start' )
732	!
733	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
734	!-- and pmci_child_datatrans are called inside the wrapper
735	!-- subroutine pmci_datatrans according to the control parameters
736	!-- nesting_mode and nesting_datatransfer_mode.
737	!-- TO_DO: why is nesting_mode given as a parameter here?
738	CALL pmci_datatrans( nesting_mode )
739
740	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
741	nesting_mode == 'vertical' ) THEN
742	!
743	!-- Exchange_horiz is needed for all parent-domains after the
744	!-- anterpolation
745	CALL exchange_horiz( u, nbgp )
746	CALL exchange_horiz( v, nbgp )
747	CALL exchange_horiz( w, nbgp )
748	IF ( .NOT. neutral ) THEN
749	CALL exchange_horiz( pt, nbgp )
750	ENDIF
751	IF ( humidity .OR. passive_scalar ) THEN
752	CALL exchange_horiz( q, nbgp )
753	ENDIF
754	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
755	ENDIF
756	!
757	!-- Correct the w top-BC in nest domains to ensure mass conservation.
758	!-- This action must never be done for the root domain. Vertical
759	!-- nesting implies mass conservation.
760	IF ( nest_domain ) THEN
761	CALL pmci_ensure_nest_mass_conservation
762	ENDIF
763
764	CALL cpu_log( log_point(60), 'nesting', 'stop' )
765
766	ENDIF
767
768	!
769	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
770	!-- when a sloping surface is used
771	IF ( sloping_surface ) THEN
772	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
773	pt_slope_offset
774	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
775	pt_slope_offset
776	ENDIF
777
778	!
779	!-- Impose a turbulent inflow using the recycling method
780	IF ( turbulent_inflow ) CALL inflow_turbulence
781
782	!
783	!-- Impose a random perturbation on the horizontal velocity field
784	IF ( create_disturbances .AND. &
785	( call_psolver_at_all_substeps .AND. &
786	intermediate_timestep_count == intermediate_timestep_count_max )&
787	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
788	intermediate_timestep_count == 1 ) ) &
789	THEN
790	time_disturb = time_disturb + dt_3d
791	IF ( time_disturb >= dt_disturb ) THEN
792	!$acc update host( u, v )
793	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
794	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
795	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
796	CALL disturb_field( nzb_u_inner, tend, u )
797	CALL disturb_field( nzb_v_inner, tend, v )
798	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
799	!
800	!-- Runs with a non-cyclic lateral wall need perturbations
801	!-- near the inflow throughout the whole simulation
802	dist_range = 1
803	CALL disturb_field( nzb_u_inner, tend, u )
804	CALL disturb_field( nzb_v_inner, tend, v )
805	dist_range = 0
806	ENDIF
807	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
808	!$acc update device( u, v )
809	time_disturb = time_disturb - dt_disturb
810	ENDIF
811	ENDIF
812
813	!
814	!-- Reduce the velocity divergence via the equation for perturbation
815	!-- pressure.
816	IF ( intermediate_timestep_count == 1 .OR. &
817	call_psolver_at_all_substeps ) THEN
818	CALL pres
819	ENDIF
820
821	!
822	!-- If required, compute liquid water content
823	IF ( cloud_physics ) THEN
824	CALL calc_liquid_water_content
825	!$acc update device( ql )
826	ENDIF
827	!
828	!-- If required, compute virtual potential temperature
829	IF ( humidity ) THEN
830	CALL compute_vpt
831	!$acc update device( vpt )
832	ENDIF
833
834	!
835	!-- Compute the diffusion quantities
836	IF ( .NOT. constant_diffusion ) THEN
837
838	!
839	!-- Determine surface fluxes shf and qsws and surface values
840	!-- pt_surface and q_surface in dependence on data from external
841	!-- file LSF_DATA respectively
842	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
843	intermediate_timestep_count == intermediate_timestep_count_max )&
844	THEN
845	CALL ls_forcing_surf ( simulated_time )
846	ENDIF
847
848	!
849	!-- First the vertical fluxes in the surface (constant flux) layer are computed
850	IF ( constant_flux_layer ) THEN
851	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
852	CALL surface_layer_fluxes
853	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
854	ENDIF
855
856	!
857	!-- If required, solve the energy balance for the surface and run soil
858	!-- model
859	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
860
861	CALL cpu_log( log_point(54), 'land_surface', 'start' )
862	CALL lsm_energy_balance
863	CALL lsm_soil_model
864	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
865	ENDIF
866	!
867	!-- Compute the diffusion coefficients
868	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
869	IF ( .NOT. humidity ) THEN
870	IF ( ocean ) THEN
871	CALL diffusivities( prho, prho_reference )
872	ELSE
873	CALL diffusivities( pt, pt_reference )
874	ENDIF
875	ELSE
876	CALL diffusivities( vpt, pt_reference )
877	ENDIF
878	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
879
880	ENDIF
881
882	!
883	!-- If required, calculate radiative fluxes and heating rates
884	IF ( radiation .AND. intermediate_timestep_count &
885	== intermediate_timestep_count_max .AND. simulated_time > &
886	skip_time_do_radiation ) THEN
887
888	time_radiation = time_radiation + dt_3d
889
890	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
891	THEN
892
893	CALL cpu_log( log_point(50), 'radiation', 'start' )
894
895	IF ( .NOT. force_radiation_call ) THEN
896	time_radiation = time_radiation - dt_radiation
897	ENDIF
898
899	IF ( radiation_scheme == 'clear-sky' ) THEN
900	CALL radiation_clearsky
901	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
902	CALL radiation_rrtmg
903	ELSE
904	CALL radiation_constant
905	ENDIF
906
907	CALL cpu_log( log_point(50), 'radiation', 'stop' )
908	ENDIF
909	ENDIF
910
911	ENDDO ! Intermediate step loop
912
913	!
914	!-- Increase simulation time and output times
915	nr_timesteps_this_run = nr_timesteps_this_run + 1
916	current_timestep_number = current_timestep_number + 1
917	simulated_time = simulated_time + dt_3d
918	simulated_time_chr = time_to_string( simulated_time )
919	time_since_reference_point = simulated_time - coupling_start_time
920
921
922
923	IF ( simulated_time >= skip_time_data_output_av ) THEN
924	time_do_av = time_do_av + dt_3d
925	ENDIF
926	IF ( simulated_time >= skip_time_do2d_xy ) THEN
927	time_do2d_xy = time_do2d_xy + dt_3d
928	ENDIF
929	IF ( simulated_time >= skip_time_do2d_xz ) THEN
930	time_do2d_xz = time_do2d_xz + dt_3d
931	ENDIF
932	IF ( simulated_time >= skip_time_do2d_yz ) THEN
933	time_do2d_yz = time_do2d_yz + dt_3d
934	ENDIF
935	IF ( simulated_time >= skip_time_do3d ) THEN
936	time_do3d = time_do3d + dt_3d
937	ENDIF
938	DO mid = 1, masks
939	IF ( simulated_time >= skip_time_domask(mid) ) THEN
940	time_domask(mid)= time_domask(mid) + dt_3d
941	ENDIF
942	ENDDO
943	time_dvrp = time_dvrp + dt_3d
944	IF ( simulated_time >= skip_time_dosp ) THEN
945	time_dosp = time_dosp + dt_3d
946	ENDIF
947	time_dots = time_dots + dt_3d
948	IF ( .NOT. first_call_lpm ) THEN
949	time_dopts = time_dopts + dt_3d
950	ENDIF
951	IF ( simulated_time >= skip_time_dopr ) THEN
952	time_dopr = time_dopr + dt_3d
953	ENDIF
954	time_dopr_listing = time_dopr_listing + dt_3d
955	time_run_control = time_run_control + dt_3d
956
957	!
958	!-- Data exchange between coupled models
959	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
960	time_coupling = time_coupling + dt_3d
961
962	!
963	!-- In case of model termination initiated by the local model
964	!-- (terminate_coupled > 0), the coupler must be skipped because it would
965	!-- cause an MPI intercomminucation hang.
966	!-- If necessary, the coupler will be called at the beginning of the
967	!-- next restart run.
968	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
969	CALL surface_coupler
970	time_coupling = time_coupling - dt_coupling
971	ENDDO
972	ENDIF
973
974	!
975	!-- Execute user-defined actions
976	CALL user_actions( 'after_integration' )
977
978	!
979	!-- If Galilei transformation is used, determine the distance that the
980	!-- model has moved so far
981	IF ( galilei_transformation ) THEN
982	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
983	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
984	ENDIF
985
986	!
987	!-- Check, if restart is necessary (because cpu-time is expiring or
988	!-- because it is forced by user) and set stop flag
989	!-- This call is skipped if the remote model has already initiated a restart.
990	IF ( .NOT. terminate_run ) CALL check_for_restart
991
992	!
993	!-- Carry out statistical analysis and output at the requested output times.
994	!-- The MOD function is used for calculating the output time counters (like
995	!-- time_dopr) in order to regard a possible decrease of the output time
996	!-- interval in case of restart runs
997
998	!
999	!-- Set a flag indicating that so far no statistics have been created
1000	!-- for this time step
1001	flow_statistics_called = .FALSE.
1002
1003	!
1004	!-- If required, call flow_statistics for averaging in time
1005	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1006	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1007	simulated_time >= skip_time_dopr ) THEN
1008	time_dopr_av = time_dopr_av + dt_3d
1009	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1010	do_sum = .TRUE.
1011	time_dopr_av = MOD( time_dopr_av, &
1012	MAX( dt_averaging_input_pr, dt_3d ) )
1013	ENDIF
1014	ENDIF
1015	IF ( do_sum ) CALL flow_statistics
1016
1017	!
1018	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1019	IF ( averaging_interval /= 0.0_wp .AND. &
1020	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1021	simulated_time >= skip_time_data_output_av ) &
1022	THEN
1023	time_do_sla = time_do_sla + dt_3d
1024	IF ( time_do_sla >= dt_averaging_input ) THEN
1025	CALL sum_up_3d_data
1026	average_count_3d = average_count_3d + 1
1027	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1028	ENDIF
1029	ENDIF
1030
1031	!
1032	!-- Calculate spectra for time averaging
1033	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1034	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1035	simulated_time >= skip_time_dosp ) THEN
1036	time_dosp_av = time_dosp_av + dt_3d
1037	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1038	CALL calc_spectra
1039	time_dosp_av = MOD( time_dosp_av, &
1040	MAX( dt_averaging_input_pr, dt_3d ) )
1041	ENDIF
1042	ENDIF
1043
1044	!
1045	!-- Call flight module and output data
1046	IF ( virtual_flight ) THEN
1047	CALL flight_measurement
1048	CALL data_output_flight
1049	ENDIF
1050
1051	!
1052	!-- Profile output (ASCII) on file
1053	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1054	CALL print_1d
1055	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1056	dt_3d ) )
1057	ENDIF
1058
1059	!
1060	!-- Graphic output for PROFIL
1061	IF ( time_dopr >= dt_dopr ) THEN
1062	IF ( dopr_n /= 0 ) CALL data_output_profiles
1063	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1064	time_dopr_av = 0.0_wp ! due to averaging (see above)
1065	ENDIF
1066
1067	!
1068	!-- Graphic output for time series
1069	IF ( time_dots >= dt_dots ) THEN
1070	CALL data_output_tseries
1071	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1072	ENDIF
1073
1074	!
1075	!-- Output of spectra (formatted for use with PROFIL), in case of no
1076	!-- time averaging, spectra has to be calculated before
1077	IF ( time_dosp >= dt_dosp ) THEN
1078	IF ( average_count_sp == 0 ) CALL calc_spectra
1079	CALL data_output_spectra
1080	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1081	ENDIF
1082
1083	!
1084	!-- 2d-data output (cross-sections)
1085	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1086	CALL data_output_2d( 'xy', 0 )
1087	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1088	ENDIF
1089	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1090	CALL data_output_2d( 'xz', 0 )
1091	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1092	ENDIF
1093	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1094	CALL data_output_2d( 'yz', 0 )
1095	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1096	ENDIF
1097
1098	!
1099	!-- 3d-data output (volume data)
1100	IF ( time_do3d >= dt_do3d ) THEN
1101	CALL data_output_3d( 0 )
1102	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1103	ENDIF
1104
1105	!
1106	!-- Masked data output
1107	DO mid = 1, masks
1108	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1109	CALL data_output_mask( 0 )
1110	time_domask(mid) = MOD( time_domask(mid), &
1111	MAX( dt_domask(mid), dt_3d ) )
1112	ENDIF
1113	ENDDO
1114
1115	!
1116	!-- Output of time-averaged 2d/3d/masked data
1117	IF ( time_do_av >= dt_data_output_av ) THEN
1118	CALL average_3d_data
1119	CALL data_output_2d( 'xy', 1 )
1120	CALL data_output_2d( 'xz', 1 )
1121	CALL data_output_2d( 'yz', 1 )
1122	CALL data_output_3d( 1 )
1123	DO mid = 1, masks
1124	CALL data_output_mask( 1 )
1125	ENDDO
1126	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1127	ENDIF
1128
1129	!
1130	!-- Output of particle time series
1131	IF ( particle_advection ) THEN
1132	IF ( time_dopts >= dt_dopts .OR. &
1133	( simulated_time >= particle_advection_start .AND. &
1134	first_call_lpm ) ) THEN
1135	CALL data_output_ptseries
1136	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1137	ENDIF
1138	ENDIF
1139
1140	!
1141	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1142	#if defined( __dvrp_graphics )
1143	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1144	#endif
1145	IF ( time_dvrp >= dt_dvrp ) THEN
1146	CALL data_output_dvrp
1147	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1148	ENDIF
1149	#if defined( __dvrp_graphics )
1150	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1151	#endif
1152
1153	!
1154	!-- If required, set the heat flux for the next time step at a random value
1155	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1156
1157	!
1158	!-- Execute user-defined actions
1159	CALL user_actions( 'after_timestep' )
1160
1161	!
1162	!-- Determine size of next time step. Save timestep dt_3d because it is
1163	!-- newly calculated in routine timestep, but required further below for
1164	!-- steering the run control output interval
1165	dt_3d_old = dt_3d
1166	CALL timestep
1167
1168	!
1169	!-- Synchronize the timestep in case of nested run.
1170	IF ( nested_run ) THEN
1171	!
1172	!-- Synchronize by unifying the time step.
1173	!-- Global minimum of all time-steps is used for all.
1174	CALL pmci_synchronize
1175	ENDIF
1176
1177	!
1178	!-- Computation and output of run control parameters.
1179	!-- This is also done whenever perturbations have been imposed
1180	IF ( time_run_control >= dt_run_control .OR. &
1181	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1182	THEN
1183	! IF ( current_timestep_number == 1 ) THEN
1184	! IF ( nxl < 7 .AND. nxr > 7 .AND. nys < 7 .AND. nyn > 7 ) THEN
1185	! u(10,7,7) = 0.55
1186	! ENDIF
1187	! PRINT*, 'calculating minmax'
1188	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, &
1189	! 'abs', 0.0_wp, u_max, u_max_ijk )
1190	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, &
1191	! 'abs', 0.0_wp, v_max, v_max_ijk )
1192	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, &
1193	! 'abs', 0.0_wp, w_max, w_max_ijk )
1194	! PRINT*, 'calculated u_max = ', u_max, ' myid = ', myid
1195	! ENDIF
1196	CALL run_control
1197	IF ( time_run_control >= dt_run_control ) THEN
1198	time_run_control = MOD( time_run_control, &
1199	MAX( dt_run_control, dt_3d_old ) )
1200	ENDIF
1201	ENDIF
1202
1203	!
1204	!-- Output elapsed simulated time in form of a progress bar on stdout
1205	IF ( myid == 0 ) CALL output_progress_bar
1206
1207	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1208
1209
1210	ENDDO ! time loop
1211
1212	IF ( myid == 0 ) CALL finish_progress_bar
1213
1214	#if defined( __dvrp_graphics )
1215	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1216	#endif
1217
1218	CALL location_message( 'finished time-stepping', .TRUE. )
1219
1220	END SUBROUTINE time_integration

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